Other Publication Details
Mandatory Fields
Reviews
Barua, D;Gupta, A;Gupta, S
2020
August
Targeting the IRE1-XBP1 axis to overcome endocrine resistance in breast cancer: Opportunities and challenges
Published
1
Optional Fields
UNFOLDED PROTEIN RESPONSE ESTROGEN-RECEPTOR-ALPHA ENDOPLASMIC-RETICULUM STRESS BOX BINDING PROTEIN-1 CELL FATE DECISIONS ER STRESS COUPLED RECEPTOR LUMINAL DOMAIN ESR1 MUTATIONS MESSENGER-RNAS
Estrogen receptor 1 (ESR1, which encodes estrogen receptor-alpha) is a key driver gene for the initiation and progression of hormone receptor-positive breast cancer. Estrogen receptor-alpha (ER) is expressed in up to 70% of cases, and patients are routinely treated with endocrine therapies. However, the development of resistance over time is common and occurs in one-third of ER-positive breast tumors, leading to disease progression and death. X-box binding protein 1 (XBP1), a key component of the unfolded protein response (UPR) and ER signaling pathway, generates a positive feedback regulatory loop that leads to increased expression of XBP1 and ER in luminal breast cancer. In this review, we highlight new insights into the mechanisms of crosstalk between XBP1 and ER signaling and its clinical implications. Next, we describe the key signaling nodes that play an important role in XBP1-mediated endocrine resistance in breast cancer. Further, we discuss XBP1 gene mutations in breast cancer and the role of these mutations in the emergence of endocrine resistance and response to treatment. Finally, we discuss the current state and future directions for targeting XBP1 in combination with standard endocrine therapy to improve clinical outcomes in endocrine-resistant breast cancer patients.
CLARE
ELSEVIER IRELAND LTD
0304-3835
29
37
10.1016/j.canlet.2020.05.020
Grant Details
Publication Themes